結果
問題 | No.1116 Cycles of Dense Graph |
ユーザー | Drice |
提出日時 | 2020-07-18 15:26:21 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,832 bytes |
コンパイル時間 | 332 ms |
コンパイル使用メモリ | 36,812 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-05-07 17:03:04 |
合計ジャッジ時間 | 2,008 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,816 KB |
testcase_01 | AC | 17 ms
6,944 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,944 KB |
testcase_04 | AC | 2 ms
6,940 KB |
testcase_05 | AC | 5 ms
6,944 KB |
testcase_06 | AC | 6 ms
6,940 KB |
testcase_07 | AC | 3 ms
6,940 KB |
testcase_08 | AC | 2 ms
6,944 KB |
testcase_09 | AC | 3 ms
6,940 KB |
testcase_10 | AC | 3 ms
6,944 KB |
testcase_11 | AC | 6 ms
6,940 KB |
testcase_12 | AC | 5 ms
6,944 KB |
testcase_13 | AC | 2 ms
6,948 KB |
testcase_14 | AC | 2 ms
6,940 KB |
testcase_15 | AC | 2 ms
6,940 KB |
testcase_16 | AC | 4 ms
6,940 KB |
testcase_17 | AC | 2 ms
6,940 KB |
testcase_18 | AC | 3 ms
6,940 KB |
testcase_19 | AC | 4 ms
6,944 KB |
testcase_20 | AC | 12 ms
6,940 KB |
testcase_21 | AC | 7 ms
6,940 KB |
testcase_22 | AC | 34 ms
6,944 KB |
testcase_23 | AC | 2 ms
6,944 KB |
testcase_24 | AC | 78 ms
6,944 KB |
testcase_25 | AC | 2 ms
6,944 KB |
testcase_26 | AC | 88 ms
6,940 KB |
testcase_27 | AC | 2 ms
6,940 KB |
testcase_28 | AC | 11 ms
6,940 KB |
testcase_29 | AC | 2 ms
6,940 KB |
testcase_30 | AC | 2 ms
6,940 KB |
testcase_31 | AC | 2 ms
6,940 KB |
testcase_32 | AC | 2 ms
6,944 KB |
testcase_33 | AC | 2 ms
6,944 KB |
testcase_34 | AC | 2 ms
6,940 KB |
testcase_35 | AC | 2 ms
6,944 KB |
testcase_36 | AC | 95 ms
6,940 KB |
testcase_37 | WA | - |
testcase_38 | WA | - |
testcase_39 | AC | 21 ms
6,944 KB |
testcase_40 | AC | 22 ms
6,944 KB |
ソースコード
#include<cstdio> //can be done by prefix sum const long long mod = 998244353; struct Edge{ int u,v; }; Edge e[35]; long long f[100005], invf[100005]; //sum[i][j]: i segment & j node used long long sum[40][40]; Edge edge[35]; int in[100005]; int queue[50]; long long power(long long a,long long b){ long long res = 1; while(b){ if(b&1) res = res*a%mod; a = a*a%mod; b /= 2; } return res; } long long inv(long long u){ return power(u,mod-2); } long long comb(int n,int m){ if(m>n || m<0) return 0; else{ return f[n]*invf[n-m]%mod*invf[m]%mod; } } int min(int a,int b){ return a>b?b:a; } int max(int a,int b){ return a>b?a:b; } void preWork(int n,int m){ f[0] = invf[0] = 1; for(long long i = 1; i <= n; i++){ f[i] = f[i-1]*i%mod; invf[i] = inv(f[i]); } for(int i = 1; i <= m; i++){ for(int j = 2; j <= 2*m; j++){ sum[i][j] = 0; int start = -1; if(i==1 && j==2) start = 1; else start = 0; for(int k = start; k <= n-j; k++){ long long add = power(2,i-1)%mod*comb(n-j,k)%mod*f[i-1+k]%mod; sum[i][j] = (sum[i][j]+add)%mod; } } } for(int i = 1; i <= m; i++){ //for(int j = i+1; j <= 2*i; j++) printf("sum[%d][%d] = %lld\n",i,j,sum[i][j]); } } int p[100005]; int vis[100005]; int find(int u){ if(p[u]==u) return u; else return p[u] = find(p[u]); } struct Graph{ int x,y; //for i,j int ok; Graph(int x=0,int y=0,int ok=0):x(x),y(y),ok(ok){} }; Graph getGraph(int n){ Graph res; int ok = 1, cycle = 0, node = 0; for(int i = 1; i <= n; i++){ int u = edge[i].u, v = edge[i].v; if(!vis[u]) vis[u] = 1, queue[++node] = u; if(!vis[v]) vis[v] = 1, queue[++node] = v; in[u]++; in[v]++; if(in[u]>2) ok = 0; int x = find(u), y = find(v); if(x==y) cycle++; p[x] = y; } if(!ok || cycle>1) res = Graph(0,0,0); if(cycle==1){ res = Graph(0,0,-1); int root = find(queue[1]); for(int i = 2; i <= node; i++){ int u = find(queue[i]); if(u!=root) res = Graph(0,0,0); } } else{ int seg = 0; for(int i = 1; i <= node; i++){ int u = find(queue[i]), eq = 0; for(int j = i+1; j <= node; j++){ if(find(queue[j])==u) eq = 1; } if(!eq) seg++; } res = Graph(seg,node,ok); } for(int i = 1; i <= node; i++){ int u = queue[i]; in[u] = 0, p[u] = u; vis[u] = 0; } return res; } int main(){ int n,m; scanf("%d%d",&n,&m); preWork(n,m); for(int i = 1; i <= m; i++){ scanf("%d%d",&e[i].u,&e[i].v); } long long answer = 0; for(int i = 3; i <= n; i++){ long long cur = comb(n,i)*f[i-1]%mod*inv(2)%mod; //printf("i = %d, cur = %lld\n",i,cur); answer = (answer+cur)%mod; } //printf("answer = %lld\n",answer); long long sign = mod-1; for(int i = 1; i <= n; i++) p[i] = i, vis[i] = 0; for(int i = 1; i < (1<<m); i++){ int cnt = 0, mask = i; for(int j = 1; j <= m; j++){ if(mask%2) edge[++cnt] = e[j]; mask /= 2; } Graph g = getGraph(cnt); //for(int j = 1; j <= cnt; j++) printf("(%d, %d), ",edge[j].u,edge[j].v); //printf("\n"); //printf("i = %d: %d %d %d\n",i,g.x,g.y,g.ok); long long cur = -1; if(g.ok==0) cur = 0; else if(g.ok==-1) cur = 1; else cur = sum[g.x][g.y]; //printf("cur = %lld\n",cur); if(cnt%2) cur = cur*sign%mod; answer = (answer+cur)%mod; } printf("%lld\n",answer); return 0; }